baber/WOPTO huggingface dataset:
Patent GB-787377-A (GB)
Title: Pattern-and-tracer control mechanism for a machine tool
Inventor: CAFOLLA CONSTANTINE FRANCIS
IPC: B23Q35/26
Filed: 1956-02-21
Abstract: 787,377. Copy grinding. SENECA FALLS MACHINE CO. Feb. 21, 1956, No. 5391/56. Class 60. [Also in Group XXII] A pattern and tracer controlled machine tool comprises a number of pattern plates A, B, C, a single tracer 10 and automatic means relatively to shift the tracer and plates to cause the tracer to coact with the plates successively. The hydraulic duplicator 12 controls movement of a cutting tool or grinding wheel acting on a rotating workpiece. Initially, the tracer slide 14 is held downwardly by a piston 21 with a stop 30 on the slide against a fixed abutment 35, so that the tracer contacts template A. A solenoidoperated valve is then actuated to move a piston 45 and advance a sliding stop 40 so that, when the piston 21 is moved upwardly by operating a solenoid 71 controlling a valve V<SP>3</SP>, the slide 14 is held with a stop 31 against the stop 40. The tracer then contacts the template B. Finally, the piston 21 is moved downwardly to release the stop 40, the stop 40 is withdrawn and the piston 21 is reversed to hold the slide 14 with a stop 32 against the abutment 35, the tracer then contacting template C. The solenoid valves are controlled by switches operated by a cam and a ratchet device actuated by the tool slide at the end of each return movement.
Patent GB-1452343-A (GB)
Title: Control circuit for regulating a dc to dc converter
IPC: H02M3/135
Filed: 1974-02-06
Abstract: 1452343 Automatic voltage control BORGWARNER CORP 6 Feb 1974 [1 March 1973] 05486/74 Headings G3R and G3X [Also in Division H2] In a D.C.-D.C. converter, the on and off times of a chopper 23, Fig. 6, feeding an output Vo via an inductor 26 and determined by respective capacitors 120, 156, Fig. 7, under control of the difference between the input voltage Vi and a reference 42. As shown in Fig. 6, an input D.C. Vi is reduced and stabilized by a pair of switches 24, 37 representing transistors, thyristors or discharge tubes. The input Vi is compared with the difference between Vo and a desired value reference 42, the controller 35 determining the ON/ OFF ratio of switches 24, 37 so as to maintain Vo constant despite change in Vi or load. This action prevents actuation of smoothing inductor 26 due to sudden increase in Vi. During OFF periods switch 37 is closed so as to pass the current in inductor 26. The voltage/time integral across inductor 26 during the ON periods is equal to that during the OFF periods. In Fig. 9 (not shown) switch 24 is a thyristor and switch 37 is a freewheeling diode. Only forward-acting voltage regulation is provided. Control circuit. Fig. 7 shows a circuit for providing pulses at 33 and 36 for switches 24 and 37 respectively. Lead 38 is connected to Vi so that Io is dependent on Vi. During the off periods, capacitor 156 is charged via resistors 46 and 48 until uni-junction transistor 152 breaks down, reversing the state of the bi-stable multi-vibrator 76 formed by transistors 124 and 137 so that a pulse is produced at 33 to turn on device 24 which initiates an on period. This condition continues until capacitor 120 has charged sufficiently to trigger uni-junction transistor 117 when multivibrator 76 again changes state to initiate an off period. Any increase in input Vi causes Ii to increase, so that capacitor 156 charges more rapidly and so shortens the on period and thus reduces the effective Vo. An increase in Vo due to change in load, causes a signal to be fed to transistors 51 and 34 so as to provide an appropriate change in the off period.
Patent GB-669903-A (GB)
Title: A method of isolating lactams
Filed: 1949-03-01
Abstract: Lactams made by the Beckmann re-arrangement of cyclic ketoximes in hot sulphuric acid or oleum are isolated by treating the raw lactam with superheated steam and are subsequently separated by known methods, e.g. by crystallization or vacuum distillation.  Steam treatment is preferably effected at reduced pressure which is not low enough to produce boiling of the lactam. The treatment removes impurities which cause turbidity in aqueous solutions of lactams and to prevent turbidity it is also necessary to neutralize the acid lactam solutions with an alkali other than ammonia.  The raw lactam may contain water.  In an example raw 6-caprolactam is treated with superheated steam at 120 DEG  C. and 200 m.ms. Hg. until dry when the vacuum is increased to 8-10 m.ms. Hg. and the lactam distilled at 140 DEG  C.  Specification 666,717 is referred to.ALSO:Lastams made by the Beckmann rearrangement of cyclic ketoximes in hot sulphuric acid or oleum are isolated by treating the raw lactam with superheated steam and are subsequently separated by known methods, e.g. by crystallization or vacuum distillation. Steam treatment is preferably effected at reduced pressure which is not low enough to make the lactam boil.  The treatment removes impurities which cause turbidity in aqueous solutions of lactams. The raw lactam may contain water. In an example raw 6-capiolactam is treated with superheated steam at 120 DEG C. and 200 m.ms. Hg. until dry when the vacuum is increased to 8-10 m.ms. Hg. and the lactam distilled at 140 DEG C.
Patent GB-926032-A (GB)
Title: Combined surface heating unit and temperature sensing unit
IPC: G05D23/24
Filed: 1961-02-15
Abstract: 926,032. Control of electric hot plates. STEVENS MANUFACTURING CO. Inc. Feb. 15, 1961 [March 2, 1960], No. 5642/61. Class 39 (3). [Also in Group XXXVIII] A unit for sensing the temperature of a vessel on a surface heating unit for example an electric range comprises a cap containing a temperature sensing device mounted in the middle of the heating unit and spring urged towards the vessel to be heated and connected by flexible leads to rigid terminal conductors. Fig. 2 shows a section through the heating unit and the sensing unit. The heating unit is a spiral sheathed tubular heater 11 which makes abutting contact with fixed contacts 19, 20 when the heater is in position. The spiral is supported on a bracket 13. Also supported by tabs in its base from bracket 13 is a temperature-sensitive unit 25 the section through which is shown in Fig. 4. This unit consists of a ceramic base 28 to which is attached by clips a sheet metal body. The top portion 35 of the sheet metal body is conical and engages under a lip 34 in the lower portion. At the top of the conical portion is an aluminium cap 40 and spring 37 urges the lower side of the conical part 35 so as to force the aluminium cap into engagement with the lower side of the vessel whose temperature is to be measured. In a recess beneath the cap is a double spiral 52 of resistance wire. A depending portion 39 of the aluminium cap carries an insulating washer 46 which supports terminal members 48, 49. The ends of the resistant spiral and flexible leads 56 are anchored in these terminal members by friction pins 59, 60. The flexible leads which may be glass insulated are brought out through apertures in the ceramic base 28 and are permanently connected to insulated conductors passing through the centre of a pair of metal tubes situated outside those tubes 16, 17 carrying the supply to the heating element. When the heating unit is placed in position the conductors in these metal tubes engage a further pair of fixed contacts in the terminal block 18.
Patent GB-901729-A (GB)
Title: Improvements in or relating to airing or drying racks
IPC: D06F57/12
Filed: 1958-02-21
Abstract: 901,729. Airing racks. ARONOVSKY, A. Feb. 6, 1959 [Feb. 21, 1958], No. 5700/58. Class 52 (5). An airing rack comprises arms 11 mounted in a wall bracket 1 for movement between pendant and vertical positions, each arm being slidable axially relatively to a bearing-member 13, carried by the arm and pivoted in the bracket, and the inner end of each arm, when horizontal, being urged by spring means to engage retaining- means on the bracket. The bearing-members 13 are mounted on the reduced inner ends 12 of the arms which are urged, by coil-springs 15, to engage apertures 6 in the bracket, the bearing- members having pivot-pins 14 which are retained, in recesses 8 in bearings 7 fixed to the bracket, by bosses 22 on a cover 19 screwed to the bracket. Lateral movement of the arms is prevented by abutment of the bearings 13, 7 and the ends of the arms, when pendant, are retained by the action of springs 15 behind bosses formed on the cover 19. In modifications, the bracket is secured to a slide movable in a vertical guide and is retained in adjusted position by a pivoted catch, the upper surface of each bearing 13 is radiused, means on the inside of the cover 19 bearing thereon, or the arms project parallelly from a bracket of rectangular shape.
Patent GB-137669-A (GB)
Title: Improvements in or relating to apparatus for automatic control of locomotives in conjunction with signals
IPC: B61L3/04
Filed: 1919-03-07
Abstract: 137,669. Kirkup, J. March 7, 1919. Track apparatus for stopping trains.-A vertically-sliding track contact is unlatched and lowered clear of the train contact by the connexion to the signal wire, and the engine apparatus, which is arranged to act for both directions of running, includes a lever adapted to release a detent from a spring-actuated spindle carrying arms which operate brake and throttle valves. The bar u slides in guides b, c and is linked to a lever o which is weighted so as to raise the bar u and carries a pivoted locking-piece r, the nose r<2> of which engages the fixed plate v, which is adjustable by the eccentric w. A stop z adjustable by the screw y, which extends beyond the cover c of the case a, determines the height to which the bar it is raised. The signal wire j carries a weight n on a slotted link k and an adjustable stop m which, in the first movement to clear, disengages the latch r<2> from the plate. The link k then lowers the bar u. The locomotive carries a spindle 6 on which are two contact-arms 7 to engage the bar u, and a crank-plate 8 linked by pins 10 to levers 11. Thus, according to the direction of running, one or other of the levers 11 is depressed and engages a pin 13 on the bellcrank 12 and, by links 14, 15 and the arm 18, removes a detent plate 20 from a notched disk on the spindle 22, which is rotated by a spring 28<a> to open the brake valve 25 and close the throttle lever. In order to prevent operation of the apparatus by excessive vibration of the levers 7, pins, which must be sheared by the lever before the mechanism can be operated, may be provided at each side of each lever.
Patent GB-741577-A (GB)
Title: Process for the electrochemical treatment of metal articles
Inventor: BECK RICHARD
IPC: C25F1/00
Filed: 1953-03-02
Abstract: 741,577. Eleotrochemical treatment of metal articles. DYNAMISATOR GES. March 2, 1953, No. 5765/53. Class 41. A process for the anodic pickling, etching or polishing of a metal article is characterized in that the article, after anodic treatment in an alkaline electrolyte with or without a preliminary cathodic treatment in the same electrolyte, is subjected to the action of an alternating current of low frequency in an acid electrolyte and is then subjected to anodic treatment in an acid electrolyte. The article, which may be of iron, is subjected to cathodic grease removal in an alkaline electrolyte, followed by anodic expulsion of hydrogen in the same electrolyte. If no grease is present the article may be only exposed anodically for a short time in the alkaline electrolyte. After washing in water the article is then exposed to alternating current of frequency below 1000 cycles per second, preferably below 100 cycles per second, in an acid electrolyte, followed by anodic etching and descaling or polishing treatment in another acid. The article may then be washed and galvanized, or a colour or varnish applied. The process may be embodied in automatically or continuously operating plant such as rotating belt plant with galvanization. Alkaline electrolytes used comprise aqueous solutions of sodium hydroxide, sodium carbonate, sodium or potassium cyanide, trisodium phosphate, and a wetting agent; acid electrolytes used for the alternating current treatment comprise aqueous solutions of sulphuric acid and hydrochloric acid.
Patent GB-792025-A (GB)
Title: Improvements in or relating to hum eliminating circuits for audio frequency amplifiers
IPC: H04B15/00
Filed: 1956-02-24
Abstract: 792,025. Valve circuits. AMALGAMATED WIRELESS (AUSTRALASIA), Ltd. Feb. 24, 1956 [March 7, 1955], No. 5790/56. Class 40 (6). In an audio-frequency amplifier having a valve supplied with grid bias from a negative H.T. line resistor, ripple is reduced by the insertion of a resistor in series with the H.T. smoothing capacitor. The ripple developed across the bias resistor R2 is cancelled at the grid of V2 by an antiphased ripple developed across Rx and fed to V2 via R3. An equivalent bridge circuit and expressions for Rx and C2 are given.
Patent GB-450330-A (GB)
Title: Improvements relating to control valves for gas burner igniters
IPC: H01H3/02
Filed: 1935-02-23
Abstract: 450,330. Valves combined with electric switches. HORSTMANN GEAR CO., Ltd., and HORSTMANN, B. G., Newbridge Works, Bath. Feb. 23, 1935, No. 5860. [Class 135] [See also Group XI] A combined valve and electric switch for use in connection with igniting devices for gas burners comprises a spring- loaded lift valve 6 for controlling the gas supply to one or more pilot burners and a movable electric contact 12 adapted to engage a fixed contact 11 to establish a circuit through an igniting filament for the pilot jet. Both valve and switch are simultaneously operated by a push button 13. The switch is housed in a shallow recess formed in a T-shaped head 2 on the valve casing, which head is adapted to be secured to the inner side of a part of the gas consuming appliance in such a manner that the push button projects through the said part.
Patent GB-1433431-A (GB)
Title: Manufacture of tubular members
IPC: B21C37/08
Filed: 1974-02-08
Abstract: 1433431 Making polygonal tubing; bending AFRICAN GATE & FENCE WORKS Ltd 8 Feb 1974 [14 Feb 1973] 05916/74 Headings B3A and B3E A method of making tubular members of polygonal cross-section from strip material comprises bending the strip by rolling to form the desired cross-sectional shape so that its edges abut along a corner of the member and welding the edges together at the corner, the longitudinal edge portions of the strip being the first to be bent and welding being effected only when the final cross-sectional shape has been formed. The strip passes through a series of roller pairs, the first pair 23 being alignment rollers, the second pair 2 bending each strip edge to form a fraction of a completed corner of the tubular member, and the remaining pairs 4, 7, 8, 11, 12 bend the strip into rectangular or other polygonal crosssection. The rollers comprise hard steel and sections (30), Fig. 10 (not shown), and mild steel spacing sections (31) which may be added or removed to vary the cross-sectional dimensions of the piping being formed. The strip edges are welded together at a high-frequency welding station 24 and a cutting blade 25 trims the weld. Lengths of the formed tube may be subsequently cut off.
Patent GB-271185-A (GB)
Title: Improvements in machines for cutting fruits or the like
IPC: B26D1/29
Filed: 1926-12-03
Abstract: 271,185. Turner, W. T. Dec. 3, 1926. Slicing vegetables &c.-Fruits placed in the open ends of cylinders 4 are fed up to blades 12 extending from a shaft 7 rotated by a handle 11 bv followers 6 carried by a sliding frame 17 adapted to be clutched by a halfnut 18 to a screw-thread 23 on an extension of the shaft 7. The nut may be thrown into or out of engagement with the screw-thread by a handle 22 operating an eccentric. Springs 24 hold the handle in either the " in " or " out " position. A stop 25 automatically moves the handle to the " out " position when the followers 6 reach the end of the cylinders. A spring 27 moves the frame 17 to its outer position when the half-nut is lifted from the screw. The device is clamped to a table by a screw 3 and the cut slices are discharged through a. shoot 15. A casing 13, 14 surrounds the knives. In a modification three or more cylinders are used.
Patent GB-1262925-A (GB)
Title: A method of manufacturing a smoking agent
Inventor: FESSMANN GERHARD
IPC: A23B4/048
Filed: 1969-02-04
Abstract: 1,262,925. Making smoke and smoking fluids. G. FESSMANN. 4 Feb., 1969 [8 Feb., 1968 (2)], No. 5948/69. Heading A2D. [Also in Division A5] A smoking agent for foodstuffs is produced by passing superheated steam through cellulosic particles, e.g. of wood, in a first reaction zone and passing the gaseous product to a second reaction zone in which it is maintained at a temperature permitting further reaction between its constituent components, oxygen, oxygen-rich air or an inert gas with an oxygen content greater than that of atmospheric air being supplied to at least one of the zones. The product may be used as produced in vapour form or condensed to a liquid before use.
Patent GB-1001436-A (GB)
Title: An arrangement for varying the cross-section of the throat of a venturi scrubber
IPC: B01D47/10
Filed: 1964-02-12
Abstract: 1,001,436. Venturi - scrubber. METALLGESELLSCHAFT A.G. Feb. 12, 1964 [Feb. 12, 1963], No. 5958/64. Heading B1R. The throat of a Venturi-scrubber has two opposed axially extending slots formed in the walls thereof and rotatably mounted within each slot a disc 4 formed with a progressively widening and deepening groove 5 of semicircular cross-section so that by rotation of the discs the cross-sectional area of the throat can be varied. The discs are synchronously rotated and are automatically adjusted in response to pressure fluctuations to maintain a constant gas velocity in the throat section.
Patent GB-351396-A (GB)
Title: Protecting aluminium and aluminium alloys against corrosion
IPC: C25D3/28
Filed: 1930-02-22
Abstract: 351,396. Electrolysis. SUTTON, H., Royal Aircraft Establishment, South Farnborough, Hampshire, and COCKS, H. C., Oasis, Sandy Lane, Woking, Surrey. Feb. 22, 1930, Nos. 5970 and 12038. [Class 41.] Cadmium, depositing; preparing surfaces.- Articles made wholly or in part of aluminium or an alloy rich in aluminium are protected against corrosion by plating in a bath prepared by solution of the double cyanide of cadmium and sodium or potassium in water or by adding cadmium compounds to a solution of alkali-metal cyanide in water; the solution must not contain more than 15 gms. per litre of free sodium cyanide or 19À9 gms. per litre of free potassium cyanide. The cadmium content may be 14-42 gms. per litre. Suitable baths consist of (i) 62 gms. of potassium-cadmium cyanide to 1 litre of water, (ii) 52 gms. of anhydrous cadmium sulphate and 64 gms. of sodium cyanide to 1 litre of water. Up to 15 cc. per litre of ammonia of density 0À880 may be added to prevent fouling of the anodes. The articles may be prepared for plating by being immersed in 10 per cent caustic soda solution, then in 10 per cent hydrochloric acid, and then scoured. Alternatively they may be sand-blasted, and immersed in 10 per cent sulphuric or hydrochloric acid and washed. Cadmium anodes may be employed in conjunction with insoluble anodes of cast iron, mild steel or stainless steel. The voltage may be 8-12 and the current density 2-16 amps. per sq. ft. The temperature should not be below 20‹ C. The articles may be heated to 100-200‹ C. after plating. The invention is applicable to plating an internal-combustion engine cylinder comprising a head machined from a forging of Y alloy (aluminium, copper, nickel and magnesium) which is screwed while hot on a steel barrel. The sparking plug holes and ports are stopped with corks, or plates and gaskets, and precautions are taken to prevent sand and electrolyte from entering the bore. Excessive deposit on the edges of the fins may be prevented by metal screens not connected to the electric circuit or by suitable disposition of the anodes. Specifications 178,422 and 235,159, [both in Class 41, Electrolysis], are referred to.
Patent GB-252793-A (GB)
Title: Improvements in and relating to electrical variable speed systems
IPC: H02P5/68
Filed: 1926-01-06
Abstract: 252,793. MacLaurin, D. Jan. 6,1926. Systems depending on the 2cse of f tu;o Or more motors.-For driving a shaft at a wide range of speeds two or more motors all designed to operate at the same potential with shunt field control take up the drive in succession, the idle motors being declutched or otherwise rendered inoperative. In the arrangement shown in Fig. 4, a controller A, B, C, D, is provided'with resistances a', b<1> adapted to regulate the shunt field-windings a, b of two motors 1,2, the first working from slow to intermediate speed and the second from intermediate to top speed. A clutch operating magnet c is energized by relays BR', BR<2> responsive to back e.m.f. of the motors when the transition speed is reached.
Patent GB-125218-A (GB)
Title: Improvements in Ferro-concrete Ship Construction.
IPC: B63B5/16
Filed: 1918-04-11
Abstract: 125,218. Hurst, C., and Queenborough Shipbuilding Co. April 11, 1918. Concrete ships.-In ferro-concrete Ships, the embedded rods or bars a, c are of rectangular &c. cross-section and arranged so that the long side of the section is parallel or substantially parallel to the skin. The vertical and horizontal bars may be interlaced and fastened or not at the intersections. The ends of the horizontal bars a may be bent round the vertical bars c, as shown at f, Fig. 3.
Patent GB-766857-A (GB)
Title: Improvements in or relating to magnetic electron lenses
IPC: H01J29/68
Filed: 1955-03-02
Abstract: 766,857. Magnetic structures; magnetizing permanent magnets. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 2, 1955 [March 5, 1954], No. 6177/55. Classes 35 and 38 (2). [Also in Group XL (a)] Two permanent ring magnets, preferably of " ferroxdure ", magnetized as in Fig. 1, form an electron lens. A ring 1, Fig. 4, is polarized by means of two coils 13, 14 so wound and/or with such a choice of turns that an oblique resultant field Hp is produced. The edges of the rings opposite the edges NS may be bevelled. The ratio of axial to radial thickness d/h is preferably 2/3 to 3/2. In the lens system a spring between the rings compensates magnetic field changes due to temperature.
Patent GB-971378-A (GB)
Title: Articles of foamed polystyrene
IPC: C08J9/22
Filed: 1961-02-20
Abstract: Polystyrene grains containing a volatile non-solvent liquid blowing agent are shaped e.g. by extrusion or injection moulding under pressure, sufficient to agglomerate the grains and leave no substantial amount of cords between them, and at a temperature too low for blowing, and the shaped products are aged at a temperature too low for blowing at least until they become opaque. Heating the articles, if desired in stages then produces foamed polystyrene.  The volatile blowing liquid is preferably a hydrocarbon boiling between 10 DEG  and 70 DEG C. Desirably it is mixed with a liquid which is relatively soluble in polystyrene, e.g. methylene chloride, chloroform, carbon tetrachloride, trichloroethylene, or benzene.  The minimum ageing period at only about 12 hours at -10 DEG C., and is of the order of 5 days at room temperature.  The polystyrene grains may contain 3-15% of blowing agent, e.g. petroleum ether and the agent may contain 0.3-0.5 methylene chloride. Preferably the grains are washed with water before introduction with the shaping machine and retain about 1-5% of their weight of water. A temperature of 85 DEG C. may be used at the entry into the machine increasing to 105-115 DEG C. in the nozzle. The shaped strip is cooled immediately on leaving the machine. The material does not blow in the press because the blowing agent dissolves in the polystyrene.  It then separates during ageing rendering the composition opaque, and blowing can then take place at a temperature as low as 85 DEG  to 95 DEG C. Specification 924,924 is referred to.